1994 Isuzu Trooper LS - needs starter, transmission flush, tune up, etc

I have had this truck for a bit over a year, he person I purchased it from bought it off of the showroom in 1995. The truck drives amazing when it was running. I bought it for occasional use, nd then started having problems. After fixing them, few more arose - bad starter, hen a friend I loaned it to added the wrong transmission fluid a day before he handed it back to me. It needs to be flushed. It will drive, ut after it gets hot it starts to slip. This only happened over a day.
The truck also has a leaking freeze plug, hich was bandaged with Bars freeze plug seal.
The bottom drips oil, ot much, ut it does drip
The truck also was in need of a small tune up as the idle was a bit off
It never failed an emissions test; I have the entire history onhand
4x4 works, ower seats, indows, unroof all work
Tires have barely 10,000 miles on them